RPC

Question 1

RPC

Answer 1

Remote Procedure Call - a program causes a procedure/subroutine to execute in a different address space or a different system

Question 2

What does RPC use under the hood

Answer 2

Sockets

Question 3

Marshalling/Serialization

Answer 3

Converting input parameters to a bytestream in RPC

Question 4

Unmarshalling/Deserialization

Answer 4

Converting from bytestream to function return value

Question 5

What happens if a pointer is passed to an RPC function

Answer 5

The data that is pointed to is convertion into a bytestream

Question 6

Local functions when called have what semantics

Answer 6

Exactly once - the function will be executed exactly once, this is not necessarily the case for remote functions

Question 7

RPC library mechanisms to ensure function is run correctly

Answer 7

Retransmission of requests (RR)
Duplicate filtering (DF)
Re-execution/re-transmission of request (RE)

Question 8

Idempotent functions

Answer 8

Re-execution resistant functions, i.e. given the same input the output is always the same no matter how many times the function is executed

Question 9

Semantics with no RR

Answer 9

Maybe (sometimes works, other times doesn’t)

Question 10

Semantics with RR and no DF

Answer 10

At least once